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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.208 13 Jul 2026

MCP archive skill distribution removed

MCP skills can no longer be distributed as .tar.gz or .zip archives via the mcp-skill-archive: URI scheme. The entire archive download, extraction, validation, and caching pipeline has been removed.

If you were distributing skills this way, you must now distribute them as direct MCP server resources or as local directory skills. Skills already cached from previous versions may remain on disk in the extraction directory but will no longer be updated or loaded.

Evidence

All tar/zip archive parsing functions removed (search for "mcp-skill-archive:", "Downloading skill archive from" — these strings are absent from v2.1.208)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.208 →